An infinite shared canvas with live cursors, conflict-free CRDT sync, and per-node access control — plus an AI layer that quietly turns every team discussion into a structured, shareable task list.
Design review
3 open comments
API schema v2
alice · 2m ago
Ship by friday?
↳ AI: 3 tasks
Q3 roadmap
carol · 1m ago
User flows
bob · 8m ago
Sit beside a teammate without sitting beside them. Cursors glide in real time. Edits resolve at the CRDT layer before they ever conflict. The room behaves the way a whiteboard would, if a whiteboard were also instant, infinite, and remembered everything.
auth.ts
alice editing
session middleware
open question →
JWT refresh flow
ben · 12s ago
race condition?
↳ 2 comments
extract to hook
agreed · ship
Share a URL. That's the entire onboarding. No admin queues, no seat licenses, no per-user provisioning. The room is the unit of collaboration — its own permissions, its own history, its own identity. You're thinking together before anyone opens a settings page.
Two people type into the same node. Three people move the same block. Y.js resolves every operation at the data structure level before a conflict can form. No save button. No merge step. The canvas stays consistent the way physics stays consistent — as a property of the system, not a feature.
The intent layer reads what your team agreed to — across nodes, connections, comments, and decisions — and surfaces a clean task list. You approve, edit, or discard. The canvas remains the source of truth. The task list is just a fast, careful reader sitting on top of it.
Most collaboration tools resolve conflict through luck — last write wins, or a human picks the winner. Ligma resolves it through math. Y.js's CRDT model treats every operation as a permanent, order-independent fact. Any two clients that exchange the same set of operations will converge to an identical state. Always.
No version numbers. No conflict modals. No "someone else edited this" warnings. The canvas simply stays correct.
Document-level permissions are a blunt instrument. Either everyone can edit, or no one can. Real teams need something finer — the architecture decision node should be owner-only, the brainstorm cluster open to all, the payment config gated to seniors.
Per-node ACL gives you exactly that. Each node carries its own permission record. Change it without touching anything else on the canvas.
The intent layer classifies every node as it's typed — action, decision, question, or reference — and assembles a live task board in the sidebar. When the meeting ends, the task list is already structured. No manual transcription, no Notion export, no slack message summarising what was agreed.
You own the output. Approve, edit, or discard any item. The AI proposes; the team decides.
Ligma is not a generic whiteboard. It encodes a specific opinion about how teams should think together — what should be fast, what should be local, what should be permissioned, and where the AI belongs.
Most tools start with the workspace and bury the work. We start with the room. Each canvas is a self-contained piece of context — its own permissions, its own history, its own URL. The team forms around the work, not the other way around.
Locking, last-write-wins, manual merges — these are workarounds for tools that were never designed for simultaneity. We chose CRDTs because the math is honest: when two people edit at the same time, both edits are real, and the structure should know how to keep them.
A document-level role model is too coarse. The senior architect should be able to lock a single decision node while leaving the rest of the canvas open. Per-node access control is not a feature — it is a position on what trust between collaborators actually means.
The AI layer reads the canvas. It proposes a structured task list. It does not write your decisions for you, and it does not replace the discussion. The team remains the source of truth; the model is just a fast, careful reader.
Open a canvas and invite your team in seconds. No setup. No seat licenses. Just a shared surface where the work actually happens.
no credit card · no workspace setup · open a room in <5s